30. My parents have promised to come to see me before I _____ for Africa.

题型：不详难度：来源：

A．have left

B．leave

C．left

D．will leave

答案

解析

略

举一反三

I don’t smoke now, but I ____for almost ten years.

A．ever smoked

B．have ever smoked

C．had ever smoked

D．was ever smoking

题型：不详难度：| 查看答案

Mr. Smith is one of the foreign experts who ___________in China.

A．works

B．is working

C．are working

D．has been working

题型：不详难度：| 查看答案

--- How long have you ___________?
--- It’s about ten years since we ___________.

A．married, married	B．been married, were married
C．got married, got married	D．been married ,got married

题型：不详难度：| 查看答案

.It is said that pandas ___________ in our country year after year.

A．are being disappeared

B．are disappearing

C．will be disappeared

D．will disappear

题型：不详难度：| 查看答案

It"s really time I should go home, but I"m enjoying myself, so I ______ here a bit longer.

A．am staying

B．have stayed

C．stayed

D．stay

题型：不详难度：| 查看答案