[ Grammar and Vocabulary ]
Someday there may be ______ on the Moon and Mars.
A. outposts
B. portholes
C. shuttle

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Grammar › ViewPast Perfect is made from what verb?
A. has
B. had
C. have
Modal Verbs › View
They _____ attend the meeting if they want.
A. can
B. could
C. will
D. should
Grammar › ViewOh! Welcome, Jack! __________.
A. That’s very kind
B. Same to you
C. Bye for now
D. Make yourself at home
Noun, Pronoun, Adjective, Verb › View
Which of the following is a demonstrative pronoun?
A. Who
B. Them
C. This
D. We
