[ Grammar ]
Do you know ___ to school yet? I’m quite worried about her.
A. why Cathy hasn’t come
B. why hasn’t Cathy come
C. when Cathy hasn’t come
D. when hasn’t Cathy come

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Modal › ViewYou _____ connect to the internet to send an email.
A. have to
B. should
C. must
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Next summer, I _________ to America for my holidays.
A. go
B. has gone
C. went
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A. tend
B. tends
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The pilot demonstrated impressive _______ maneuvers during the air show.
A. challenge
B. hardship
C. cycle
D. aeriel
