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The robot needs _______ once a month. And we will check it for you for free.
#48844
A
to check
B
checked
C
checking
D
to checking
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You should try _______down and take a rest.
#49645
A
lie.
B
to lie.
C
lies.
D
lay.
—Doctor, I am afraid I am getting fat these days. — _____ slim, you should change your diet and lifestyle. 
#49022
A
Keeping
B
Keeps
C
Keep
D
To keep
Jim and his friends had great fun         at the pool.
#50506
A
to swim
B
swimming
C
swim
D
swam
Don’t forget ________ an umbrella. It’s going to rain.
#50855
A
to take
B
to bring
C
taking
D
bringing
—Don’t forget      your homework here tomorrow. —I     .
#48525
A
to bring ; won’t
B
to take; won’t
C
bringing; don’t
D
taking; don’t