牙再植后，X线片显示牙根炎症性吸收的最早时间是()A．伤后2～4周

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问题单项选择题

牙再植后，X线片显示牙根炎症性吸收的最早时间是()

A．伤后2～4周

B．伤后1～4个月

C．伤后2～5个月

D．伤后3～6个月

E．伤后1～7个月

答案

参考答案：B

完形填空

根据所给汉语和句子意思，用英语补全句子。

1.As we all know, waste water and gas ______________________(对……有不良影响)the environment.

2.A pair of pandas __________________(赠送)to Australia months ago, which represents the friendship between Australian and Chinese people.

3.---Do you often use Baidu ?

---Yes, it’s one of ____________________________(最受欢迎的)Internet search engines.

选择题

Could you tell me _______ the bike without any help this morning?

A．how does he fix up

B．how he fixes up

C．how he fixed up

D．how did he fix up