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——I don’t know ______ watch this is. Do you know? ——It might be Gao Lei’s.
#40811
A
who
B
whom
C
who’s
D
whose
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             ,we’ll go for a picnic next week.
#41098
A
If weather permit
B
Weather permitting
C
Weather permitted
D
Weather permission
---- _____ do you play football? ----  Once a week.
#40843
A
How long
B
How soon
C
How often
D
How
Tom，________his brother，________playing computer games.
#41092
A
1ike; like
B
1ikes；likes
C
1ike；likes
D
1ikes；like
_____ we need more time is obvious.
#40748
A
What
B
That
C
/
D
Who
_____ have you been swimming? For five years.
#41171
A
How many times
B
How long
C
How often
D
How much