Time,________ correctly, is money in the bank. [ ]
A. to use
B. used
C. using
D. use
答案:B
下列农业企业投资活动中,属于直接投资的是()。
A.购置机器设备
B.购买国库券
C.购买公司股票
D.购买企业债券
—Betty, what are you doing now?
—I'm waiting ____________ the bus. It takes me to school every morning. [ ]
A. at
B. for
C. on
D. in