It's nearly seven o'clock. Mary______be back home at this moment.
A. have to
B. must
C. can
Which place will you choose if you want to visit long, sandy beaches？
A. Soll in Austria.
Bangkok in Thailand.
C. Kauai in Hawaii.
A．orB．andC．but
A. or
B. and
C. but
______is one way to prevent(防止) the strong sunshine in Bangkok.
A. Wearing a hat
B. Staying in the forests
Climbing up the mountains
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