The cell phone I ______  I ______  is on the back seat of my car.

A. thought; had lost    　　　B. think; had lost

C. thought; have lost    　　　D. think; lost

Our teacher advised us 　　　 more English after class.

A.to speak　　　 B.speak　　　　　 　 C.speaking　　　 　 D.spoke

He said he ____ an American before.

A. has never met 　 　 B. had never met

C. would never meet 　 D. was never met

If water becomes increasingly short in decades ____, water shortage will become a hot issue all over the world．

　 A．coming　　 　 B．having come　 　　　　　　　　 C．to come　　　 D．to be coming

The students were told to _____ their English before going abroad.

A. give up     　　　 B. polish up    　　　　   C. use up   　　　 D. end up

Our cars are s _______ only in color. Actually they are of great difference.

______ I had time, I would have run round that lake again.（ ）

A. If 　　　 B. Unless C. Had D. When

The problem is so difficult that it requires ______ carefully.

A. to deal with　 　　　　　　　　 B. to do with　　

C. to be done　 　 　　　　　　　 D. dealing with

The baby sat on________mother’s knees, learning to speak.

A. it　　　 B. it’s　　 C. its　　 D. /