[ Modal Verbs ]
A pilot __________________ train for many years to obtain his license.
A. have to
B. has to
C. don’t have to
D. doesn’t have to
Select your answer:
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Idioms › ViewTo “screw up” is to ___.
a. do it perfectly
b. make a mess
c. go higher and higher
Gerunds and Infinitives › View
My father spends all morning ___ the radio.
A. to listen
B. listen
C. listening