问题
选择题
Tim is weak in math, so he is trying _________ up with other students now.
A．to catch
B．catch
C．catching
D．caught
答案
答案：A
try to do sth，表示努力做某事，故选答案为A。
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Tim is weak in math, so he is trying _________ up with other students now.
A．to catch
B．catch
C．catching
D．caught
答案：A
try to do sth，表示努力做某事，故选答案为A。