Last Christmas my father gave me so interesting a book as a present ________ nothing else could match．

A．that

B．as

C．where

D．which

Under no circumstances ________ to the teacher．

A．is this the first time he has lied

B．was this the first time he has lied

C．is this the first time has he lied

D．is this the first time he is lying

Nearly three months had gone by ________ the seriously injured girl showed a slight sign of recovery．

A．until

B．after

C．since

D．before

The bus hit against a tree in the fog and ________ to the deep valley，with ten passengers killed and twenty wounded．

A．down did it roll

B．down rolled it

C．it down rolled

D．down it rolled

With the successful launch of Tiangong－1, which was ________ breakthrough in this field, China's space dream took a step closer to________ reality．

A．the; a

B．a; /

C．a; the

D．the; /

These serious problems, ________, will later affect teenagers and even the nation's future．

A．not if solved properly

B．if solved properly

C．not if properly solved

D．if not properly solved

I can't thank you ________ much for your help．Without it I ________ in my study．

A．so; couldn't have succeeded

B．too; couldn't succeed

C．too; couldn't have succeeded

D．that; couldn't have succeeded

The city of Rome has just passed a new law to prevent cruelty to animals, which many people say can ________ the civilization of a city．

A．manage

B．separate

C．handle

D．measure

－I wonder why he has been acting so strangely these days．

－Recent pressure at work may ________ his behavior．

A．account for

B．make for

C．change for

D．stand for

Doing your homework is a sure way to improve your test scores, and this is especially true ________ it comes to classroom tests．

A．before

B．since

C．when

D．after