[ Grammar ]
Bob and Pamela (pack) their suitcases since 6 o’clock.
a) have been packing
b) have packed
c) having been packing

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Modal Verbs › ViewI ______ get up earliy. I have a lot to do.
A. should
B. must
C. don’t have to
D. mustn’t
Grammar › View
Which of the following is an example of an independent clause?
A. Since it was my mother’s birthday
B. When she lived in Paris
C. Writers gathered at the home of Gertrude Stein.
D. Because it was raining
Grammar › ViewWhat time ….
A. the train leaves?
B. does the train leave?
C. is the train leaving?
D. leaves the train
Prepositions › View
John needs to submit the report _________ his boss before 5 pm.
A. At
B. To
C. Of
D. On