He asked if she ________ Jack.A．knowsB．knewC．knowingD．known

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He asked if she ________ Jack.

A．knows

B．knew

C．knowing

D．known

答案

解析

本题的主句动词为过去式，从句也应该用过去式一种，故选B,knew。

举一反三

Tell Tom to call me as soon as he ________ .

A．will arrive

B．gets there

C．has gone

D．reach here

题型：不详难度：| 查看答案

Yesterday my brother __________to say "Happy Birthday" to me from Spain.

A．calls

B．called

C．is calling

D．was calling

题型：不详难度：| 查看答案

Mike and I ______in the library now.

A．read

B．are reading

C．is reading

D．am reading

题型：不详难度：| 查看答案

----Where did you go last week ? ----I ______to the park.

A．went

B．go

C．will go

D．did go

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---I called you yesterday afternoon, but there was no reply.
---I ______ a dolphin show the zoo with my cousins.

A．watched

B．will watch

C．am watching

D．was watching

题型：不详难度：| 查看答案