---_____do you visit your uncle?---once a week .
#56274
A
How long
B
How many
C
How much
D
How often
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---Why is the little boy crying over there? -----He is too short to reach ___ the toy bear ___ the toy car on the shelf?
#55650
A
both …and
B
either …or
C
neither….nor
D
not…but[
Many people believe we will face environmental disasters _________ we completely change the way we live.
#57124
A
but
B
though
C
unless
D
until