Kiểm tra trực tuyến

1. Recently, there have been several outbreaks of disease like legionnaire's syndrome, and doctors don't know ________.

• what the cause is
• is what the cause
• what is the cause
• the cause is what

2. Rhododendrons would rather ________ in shady places, and so would azaleas.

• grow
• grown
• to grow
• growing

3. Modern blimps like the famous Goodyear blimps ________ the first ones in that they are filled with helium instead of hydrogen.

• different
• is different from
• differ from
• different from

4. ________ a sizable geographic area, it constitutes a biome.

• When a group of plants and animals occupies
• A group of plants and animals occupies
• That a group of plants and animals occupies
• A group of plants and animals occupying

5. ________ is entirely up to him.

• How is he traveling
• He travels
• How he travels
• How traveling

6. American author John Updike, ________ spent his boyhood in Shillington, Pennsylvania.

• he was the only child of a high school mathematics teacher
• the only child of a high school mathematics teacher
• was the only child of a high school mathematics teacher
• whom the only child of a high school mathematics teacher

7. Some of the rainwater from clouds evaporates before ________.

• the ground reaches
• reach the ground
• reaching the ground
• to reach the ground

8. All of the people at the AAME conference are ________.

• mathematic's teachers
• mathematics teacher
• mathematic teachers
• mathematics teachers

9. Although the Ojibwa Indians fought frequently with the Sioux, they didn't have ________ with early white settlers.

• large contact
• many contact
• much contact
• lots contact

10. It is now believed that some damage to tissues may result ________ them to frequent X-rays.

• expose
• from exposing
• the exposing
• from exposure

11. He entered a university________.

• at age sixteen years old
• at the age of sixteen
• when he had sixteen years
• when sixteen years were his age

12. In a hot, sunny climate, man acclimatizes by eating less, drinking more liquids, wearing lighter clothing, and ________.

• darkens his skin
• experiencing a darkening of the skin
• skin changes that darken
• his skin may darken

13. Some forms of mollusks are extremely useful as food, especially the bivalves ________ oysters, clams, and scallops.

• so
• as
• such
• such as

14. ________ techniques have been developed in recent years to diagnose (genetic diseases in the developing fetus.

• Several of
• They are several
• Several
• There are several