Wedidn’tknow________tovisitourschool.
A. whendidhecome
B. whenwouldhecome
C. whenhewascoming
D. whenhecame
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--DidyoucatchwhatIsaid?Sorry.I________atextmessagejustnow.
A. hadanswering
B. haveanswered
C. wouldanswer
D. wasanswering
--Whendidthecomputercrash?Thismorning,whileI________thereadingmaterialsdownloadedfromsomewebsites.
A. havesorted
B. wassorting
C. amsorting
D. hadsorted
Themanagerwasconcernedtohearthattwoofhistrustedworkers_______.
A. willleave
B. areleaving
C. haveleft
D. wereleaving
--Howdidtheaccidenthappen?Thegirl_______Wechat(微信)whilewalkingacrossthestreet.
A. reads
B. isreading
C. wasreading
D. read