—I have worked hard at math, but it seems that I haven’t made any progress.
—Keep on _____ at it, and you will be successful.
A. work B. working C. to work
相关试题
单词辨音（判断下列每组单词画线部分字母的读音相同与否，相同的在括号内画“√”；不同的则在括号内画“×”）Dale Grace
fine in
Bevening
ruler blue
ok orange
--_____________？--P-E-N.
A.Is this your pen
B. What’s this
C.How do you spell pen.
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