Chọn đáp án đúng

1.Time passes _________ when you are alone.
A. slowly
B. slow
C. more slow
D. slowlly
2.There are three main types of musical instruments: Wind instruments, String instruments and ___________ instruments.
A. beat
B. percussion
C. classical
D. jazz
3.It's too _________ for me to buy the CD.
A. expensed
B. expensing
C. expense
D. expensive