Tom thanked his sister  helping him    his lessons.
#49181
A
for; with
B
to; in
C
of; about
D
on; at
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Jeff goes to work ________ and his wife(妻子) goes to work ________.
#48060
A
by car, on bike
B
by a car; on a bike
C
by car; on her bike
D
by his car, in her bike
We all know that doing morning exercises ______. 
#50401
A
is good for our healthy
B
are good for our healthy
C
are good for our health
D
is good for our health