Some people are used to getting up late ______ a cold morning．（ ）
| A． |
on |
B． |
in |
C． |
at |
D． |
of |
Nobody worked the math problem out． It was ____ one of all．（ ）
| A． |
easier |
B． |
the easiest |
| C． |
more difficult |
D． |
the most difficult |
His car ____ five years ago， but it looks quite new．（ ）
| A． |
buys |
B． |
bought |
C． |
is bought |
D． |
was bought |
Next week， each student in the class ____ a small gift from their teachers．（ ）
| A． |
receives |
B． |
received |
| C． |
will receive |
D． |
has received |
You'd better leave ____， or trouble will come to you．（ ）
| A． |
lively |
B． |
friendly |
C． |
heavily |
D． |
quickly |
One ____ of the book is missing， so I can't learn the whole story．（ ）
| A． |
copy |
B． |
page |
C． |
writer |
D． |
reader |