Many years ago,robots_____to do many things as now. [ ]A. couldn"t

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Many years ago,robots_____to do many things   as now.     [     ]
A. couldn"t
B. can"t
C. weren"t able
D. be able

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举一反三

Nine years ago Helen _____ in San Francisco,but now she_____in Canada.[ ]
A. live;lives
B. lived;lived
C. lives ; lived
D. lived; lives

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Look! There_________a new bridge.It_________ last month.    [     ]
A. is ; build
B. was ; built
C. is;was built
D. is;is built

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Wang Liqin _____ the national team in 1998 and then he _____ a lot of ping-pong matches.[ ]
A. joins ; takes part in
B. joins ; took part in
C. joined ; takes part in
D. joined ; took part in

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选出括号中正确的词1. My brother said he        ( is; was) doing his homework.
2. Johnny said he        ( can; could) speak Japanese.
3. Mike says he         ( goes; went) to Shangbai last Saturday.
4.Wendy"s math teacher said she        ( was;is) a good student.
5. Gina told him that she        ( will; would) visit China the next year.

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—I hear Sam has gone to Qingdao for his holiday.
—Oh, how nice ! Do you know when he        ?  [     ]
A. left
B. was leaving
C. has left
D. had left

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