If you hear such a rumor, _____ thoroughly.
A. examine
B. inspect
C. check
D. investigate
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He was anxiously _____ her reply.
A. waiting
B. awaiting
C. awaiting for
D. waiting at
My letter arrived after he passed away. I regret _____ earlier.
A. having written
B. to have written
C. not having written
D. not to write
The purpose of the program is _____ educational.
A. primary
B. primarily
C. prime
D. primely
It’ll be a busy day for me. There are twenty _____ on my to-do list.
A. items
B. things
C. matters
D. articles