Selecting a mobile phone for personal use is no easy task because technology ___

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Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly.

[ ]

A. is changing
B. has changed
C. will have changed
D. will change

答案

举一反三

I want to know when he _____ for New York.
A. has left
B. is leaving
C. had left
D. would leave

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They don"t buy any new clothes because they _____ money to buy a big house.
A. save
B. are saving
C. is saving
D. were saving

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— I"m going to the States.
— How long _____ you _____ in the States? [ ]
A. are; stayed
B. are; staying
C. have; stayed
D. did; stay

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Look! The twins _____ their mother do the housework.
A. are wanting
B. help
C. are helping
D. are looking

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Is she _____ something?
A. eat
B. eating
C. eaten
D. eats

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