[ Perfect Tenses ]
Which auxiliary verbs are used to form the future perfect tense?
A. is, are
B. was, were
C. will have, shall have
D. has, have

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Grammar › ViewThere is …………orange in the box.
A. a
B. an
C. some
D. any
Tenses › View
Fill in the blank: She (to cook) dinner when the guests arrived.
A. cooked
B. was cooking
C. cooking
D. will cook
Grammar › ViewThe waste of the factory the river.
A. Pollutes
B. Dirties
C. Wastes
D. Extinct
Tenses › View
The dog ______ (bark) loudly right now.
A. is barking
B. barks
C. are barking
D. barking
