Jack wasn't saying anything，but the teacher smiled at him ________ he had done something very clever.(2011·湖南)

A．as if B．in case C．while D．thought

I travel to the Binhai New Area by light railway every day，________ do many businessmen who live in downtown Tianjin.

A．as B．which C．when D．though

(2011·山東)He had his camera ready ________ he saw something that would make a good picture.

A．even if B．if only C．in case D．so that

(2010·重慶)Today，we will begin ________ we stopped yesterday so that no point will be left out.

A．when B．where

C．how D．what

________ unemployment and crime are high，it can be assumed that the latter is due to the former.

A．Before B．Where C．Unless D．Until

You'd better not leave the medicine ________ kids can get at it.

A．even if B．which C．where D．so that

In peace，too，the Red Cross is expected to send help ________ there is human suffering.

A．whoever B．however C．whatever D．wherever

If you are traveling ________ the customs are really foreign to your own，please do as the Romans do.

A．in which B．what C．when D．where

________，he talks a lot about his favorite singers after class.

A．A quiet student as he may be

B．Quiet student as he may be

C．Be a quiet student as he may

D．Quiet as he may be a student

A man cannot smile like a child，________ a child smiles with his eyes，while a man smiles with his lips alone.

A．so B．but C．and D．for