【推荐1】We won’t get good grades in P. E ________ we keep exercising every day.

A．if

B．because

C．unless

D．since

【推荐2】The play has remained a mystery _______________ the producer wants to surprise the audience.

A．although	B．because
C．unless	D．until

【推荐3】The reason      I was late is        I missed the early bus.

A．which; because	B．because; why
C．why; that	D．that; whether

【推荐2】Many people believe we are heading for an environmental disaster ________ we basically change the way we live.

A．but

B．though

C．unless

D．in case

【推荐3】The seeming logic of addressing the issue has fallen apart that ________ economy develops, interpersonal relationships worsen, for people are willing to take due responsibility.

A．unless

B．before

C．what

D．where

【推荐1】-----Why are you just sitting here while they are rushing off their feet?
-----How can I help _______ they won’t let me?

A．though

B．in case

C．when

D．as

【推荐2】From time to time Jason turned round,        he was searching for someone.

A．as if	B．even if
C．if only	D．what if

【推荐3】—Will you go to Mary’s birthday party?
—No. _____ invited, I cannot go to it. I will be very busy then.

A．Only if	B．Now that
C．As though	D．Even though

【推荐1】_____the new fund-raising plan is approved, we will soon have more money to build the gymnasium.

A．While

B．Given

C．Unless

D．Even if

【推荐2】         you have finished your homework can you go out to play.

A．Only if	B．Providing that
C．On condition that	D．As long as

【推荐3】I think you should complain, _____, of course, you are happy with the way things are.

A．until

B．although

C．when

D．unless