味精的主要成分是谷氨酸钠，是人体必不可少的一种氨基酸，科学证

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问题单项选择题

味精的主要成分是谷氨酸钠，是人体必不可少的一种氨基酸，科学证明味精对人体有益无害，但食用味精时应注意如下几个问题，下面哪个不正确（）

A.若菜肴需要勾芡，则需在勾芡后放入

B.味精不宜食用过频

C.作馅料时不宜使用味精

D.炒菜时不宜放入过早

答案

参考答案：A

选择题

We are not permitted ________ mobile phones to school. [ ]

A. taking

B. to take

C. take

D. taken

改错题

单句改错。

1. They had to return from the hiking in the desert, for their food almost ran out of.

2. We are totally opposed to make any changes in the plan.

3. You are absolute right. It is our responsibility to stop all illegal activities.

4. Nobody knew how the traffic accident came out the day before yesterday.

5. What would have happened if Bob walked farther, as far as the river bank?

6. English speakers also enjoy Tang poems from China for particular.

7. Do not to be disappoint if you have to try several times before you stop smoking.

8. Comparing with most of the women at that time, she was lucky.

9. Large quantities of energy from the sun is being taken with modern equipment.

10. China has five years of steadily economic growth.