Many people prefer paper bags to plastic ones because they are environmentally ________．

A．welcome

B．useful

C．friendly

D．helpful

Great efforts to increase agricultural production must be made if food shortage ________ avoided．

A．is to be

B．can be

C．will be

D．has been

Actually it was only a small house party, so we ________．so formally．

A．needn’t dress up

B．didn’t need have dressed up

C．don’t need dress up

D．needn’t have dressed up

I don’t know who invented ________．telephone, but it’s really ________．most wonderful invention．

A．the; a

B．不填; the

C．a; the

D．不填; a

Nearly all the football matches of the 2006 FIFA World Cup were televised ________．from Germany this summer．

A．live

B．actively

C．alive

D．lively

－Could I make it 14^th of July?

－________．

A．You can manage it

B．That’s fine with me

C．No a bit of it

D．Go ahead with it

Mike didn’t notice Alice entering the room．He ________ a phone call．

A．answered

B．has answered

C．was answering

D．is answering

－I hear Jane has gone to the Holy Island for her holiday．

－Oh, how nice!Do you know when she ________?

A．was leaving

B．had left．

C．has left

D．left

－Have you thought of a topic for your speech yet?

－No, I ________ a lot about it, but I haven’t decided．

A．will think

B．have been thinking．

C．had thought

D．was thinking

It is rather difficult to make friends with him, but his friendship, ________, is more true than any other’s．

A．once gained．

B．when to gain

C．after gaining

D．while gaining