AlthoughtheEiffelTowertolastfo

Although the Eiffel Tower ________ to last for 20 years, it is still standing today.

A．has designed

B．had designed

C．is designed

D．was designed

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It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.

A．what

B．that

C．how

D．whether

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A．die down

B．die out

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A．cut

B．are cut

C．are being cut

D．had been cut

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A．Since

B．As

C．With

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At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents.

A．turning to

B．watching over

C．watching out

D．digging out

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