[ Modals ]
They _____ leave earlier to avoid the traffic.
A. has to
B. have to
C. hadn’t to
D. didn’t used to
Select your answer:
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Vocabulary and Grammar › ViewToday, the menu on the ISS includes more than 100 items …….. astronauts can choose their daily meals before they fly into space.
A. which
B. from which
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It was really difficult _____ on the hot sand.
A. to walk
B. walk
C. walking
D. for walking