[ Grammar ]
The teacher has been concerned __________ some time now.
A. of
B. for
C. too
D. since
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Articles › View… Queen is … very popular rock group.
A. The / a
B. – / a
C. The / the
D. the / an
Tenses › View
I ___ to the store when I realized I had forgotten my wallet.
A. went
B. go
C. was going
D. had gone
Modals › ViewI can sing now but I ________ sing very well when I was a child.
A. can’t
B. must
C. could
D. couldn’t
Grammar › View
_______ they twins? They look the same.
A. Is
B. Did
C. Are
D. Was