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We ________fight against pollution．

A．may             B．should           C．mustn’t           D．needn’t

He is an unpleasant man．I don’t understand  _________she married him．

A．whether               B．if           C．why                   D．how

It is said that Chery(奇瑞)________ a new kind of car recently．

A．has developed        B．developed            C．develops         D．had developed

Tom _______a piece of waste paper，and put it into the rubbish bag．

A．put away       B．threw away       C．stood up           D．picked up

Beijing is the 29th city ______holds the Olympic Games．

A．where           B．that              C．which             D．what

一________do you visit your grandparents?

—Once a week．

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

一Work hard, or you will_____ others．

一OK．I’ll try my best．

A．fall off           B．fall over               C．fall behind              D．fall down

The way we learn English is quite different ___________that we learn maths．

A．from            B．off          C．between               D．with

It’s dangerous for you________ that tall tree．

A．climb       B．to climb           C．climbing           D．climbed

一Whose watch is lost?

一Mr．Smith’s．Look ! He ________it everywhere．

A．looked for     B．was looking for       C．looks for           D．is looking for