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Shangri-la, which is _______ happy home for the local people, is also ________ home to many birds and animals.

A．the; a            B．/; /               C．a(chǎn); /              D．/; a

Without facts, we cannot form a worthwhile opinion for we need to have a factual knowledge ________ our thinking.

A．which to base on                        B．which to be based on

C．on which to be based                    D．on which to base

It is generally considered unwise to give children ________ they wants.

A．however          B．no matter how      C．whatever          D．no matter what

Mountain climbing ________ be very tiring, and many people feel sick ________ the atmosphere gets thinner.

A．may; while        B．can; as            C．must; though       D．should; for

Please take down my telephone number ________ something important happens.

A．in case           B．now that          C．even though       D．a(chǎn)s if

These viruses, if ________ in, can result in illness or even death.

A．breathing         B．breathed          C．breathe           D．to breathe

__________ that these creatures are linked to a common ancestor.

A．As is believed                          B．What is believed

C．That is believed                         D．It is believed

Playing on the football pitch ____________________.

A．some students are with their P.E. teacher

B．their P. E. teacher is with some students

C．some students with their P. E. teacher are

D．a(chǎn)re some students with their P. E. teacher

Colin was about to get off the camel ________ a child ran towards him.

A．while             B．when             C．a(chǎn)s               D．since

I feel so excited! At this time tomorrow morning, I ________ to Shanghai.

A．will be flying                           B．will fly

C．have been flying                        D．have flown