Thequestionthatpuzzledthemisth

The question that puzzled them is ____ they can get rid of the air pollution in the area.

A．how is it that

B．that how

C．that it is how

D．how it is that

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. Every boy and every girl as well as some teachers who ___ to visit the museum _____required to be at the bus station at 6:30.

A．are ; is

B．are ; are

C．is ; are

D．is ;is

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I’ll never forget such an attractive city ___ I spent many happy hours there with my classmates last summer holidays.

A．that

B．where

C．in which

D．because

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______ , I think , and the problem could be settled.

A．Making great efforts	B．So long as you keep up your spirits
C．If you double your efforts	D．A bit more effort

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At home, he keeps some pets, to which he _____ all his spare time.

A．spends

B．offers

C．devotes

D．provides

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. ___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.

A．While

B．When

C．As

D．Since

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