It _____five months since I came to America.

A．was               B．is              C．will be               D．had been

I didn’t hear you because I ____ a shower at that moment.

A．have taken         B．will take           C．was taking             D．am talking

It’s a secret. You _____ tell anyone about it.

A．mustn’t            B．must             C．can             D．needn’t

---How long has the factory _______?

---Since three years ago.

A．open              B．be open            C．been open            D．been opened

_____ useful information he has found on the Internet!

A．What a              B．What               C．How a                   D．How

Sarah had to stay at home and look after her grandma, _______?

A．did she          B．didn’t she              C．had she           D．hadn’t she

---Can you tell me whom the play ______ in 1997?

---Sorry, I don’t know.

A．was written by      B．was written           C．is written             D．is written by

Don’t worry! The firefighters will ______ the fire as soon as possible.

A．put out             B．put away             C．put up                 C．put off

Most kids hope __________ their time at school..

A．not waste       B．to not waste               C．not to waste                  D to waste

We believe that these mountains ______ with trees in a few years’ time.

A．are covered         B．will cover            C．will be covered          D．are covering