Even if we learn something well， we will forget it_____we use it．（ ）
| A． |
while |
B． |
until |
C． |
unless |
Annie can play _____ piano very well．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
The bridge near our school was built 1998．（ ）
| A． |
up |
B． |
of |
C． |
in |
Shanghai is a very city．（ ）
| A． |
big |
B． |
bigger |
C． |
biggest |
Not only Sam but also his parents coming to China soon．（ ）
| A． |
is |
B． |
are |
C． |
were |
Mr. Smith a novel last year but I don't know whether he has finished it．（ ）
| A． |
wrote |
| B． |
was writing |
| C． |
has written |