Mr. Lin decided to take the lead.________called for everyone’s attention.

A.I B.He C.She D.They

These people come ________ different countries. They are here to learn Chinese.

A.from B.on C.in D.for

Bones are important ________ they help us move freely.

A.so B.but C.because D.although

The mountain trip is________than the lake expedition.

A.popular B.more popular C.most popular D.the most popular

—Scientists still ________ explain exactly why people dream.

—That’s right. They might understand it all someday, but they aren’t sure now.

A.shouldn’t B.mustn’t C.needn’t D.can’t

Tom usually________to school early but his sister doesn’t.

A.go B.goes C.went D.will go

Jim________with me on the phone at 6:00 pm yesterday.

A.talks B.talked C.is talking D.was talking

Tilly Smith ________ her geography lesson to save many lives in a tsunami in 2004.

A.uses B.is using C.used D.was using

—Adam, where are the other members of our team?

—They________ research in the library now. Let’s go and join them.

A.do B.did C.will do D.are doing

—________do you help at the Food Bank, Lily?

—Once a month.

A.How often B.How long C.How many D.How much