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Cars do cause us some health problems, in fact, far more serious ________ than mobile phones do.

A．one              B．ones             C．it                D．those

How can they learn much ________ they spend so much time playing computer games?

A．a(chǎn)lthough          B．when             C．till               D．until

I ________ with my grandma because my parents have gone abroad for further study.

A．stayed            B．a(chǎn)m staying         C．have stayed        D．was staying

Was it from the lake ________ he often went fishing ________ he saved the drowning girl?

A．that; that          B．where; where      C．where; that        D．that; where

We drove to the airport to meet an expert from Germany, about 50 years old, his hair ________.

A．was completely grey                     B．be completely grey

C．to be completely grey                    D．completely grey

--- Do you think the weather is good enough for a field trip?

--- Yes. You couldn’t hope for ________ day at this time of the year.

A．the nice          B．the nicest         C．a(chǎn) nicer            D．a(chǎn) nice

--- ________ will win the first place in the relay race?

--- I don’t know.

A．Do you think who                       B．Do you think which class

C．Which class do you think                  D．Whom do you think

________ so delicious, the food in this market was sold out soon.

A．Tasted            B．Tasting            C．Being tasted       D．Having been tasted