Winter is season，and winter vacation is than summer vacation．（ ）
| A． |
colder； the shortest |
B． |
the coldest； short |
| C． |
the coldest； shorter |
D． |
cold； shorter |
How beautiful your skirt is! Could you please tell me ？
Thanks． I bought it on Taobao．（ ）
| A． |
where you bought it |
| B． |
when you bought it |
| C． |
why you bought it |
Yesterday， I the subway home when I suddenly found I was on the wrong line．（ ）
| A． |
took |
B． |
was taking |
C． |
had taken |
Sally， I heard you're going to America． Will you stay there？
Two whole years．（ ）
| A． |
How soon |
B． |
How often |
C． |
How long |
Wow…another gift! What's in the box？
I'm not sure． It be a pair of sports shoes．（ ）
| A． |
must |
B． |
may |
C． |
will |
A smile costs _________，but gives so much．So we should learn to smile．（ ）
| A． |
something |
B． |
anything |
C． |
nothing |
D． |
everything |