【推荐1】________is known to us is that tobacco contains nicotine and other harmful products, so you should give up smoking.

A．As	B．It
C．What	D．Which

【推荐2】________ brought them to the public’s attention was that they were condemned ________ in some illegal business practices to obtain their current position in the market.

A．Which; to be involved	B．That; to involve
C．What; to be involved	D．That; to be involved

【推荐3】______ is important in study is diligence rather than intelligence.

A．Which	B．What
C．Who	D．When

【推荐1】It was in this old school ________ the government built in 1968 ________ he received good education.

A．where; when

B．which; that

C．that; which

D．where; which

【推荐2】—________ you got to know where I was yesterday?
—Through a student.

A．Where was it that	B．When was it that
C．How was it that	D．Was it how that

【推荐3】—I can’t find Mr Smith. Where did you meet him this morning?
—It was in the hotel ________ he stayed ________ I met him.

A．where, that

B．which, that

C．the one, that

D．that,where