There is a mistake in your sentence．
Oh， I see． I've dropped _____________"u" in the word "usually"．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
We have two math classes ______ Tuesday morning．（ ）
| A． |
in |
B． |
on |
C． |
of |
D． |
at |
I think it's useful for you ______ a second language．（ ）
| A． |
learn |
B． |
to learn |
| C． |
learning |
D． |
to learning |
My bike was broken． It ______ me two hours to walk home．（ ）
| A． |
cost |
B． |
spent |
C． |
took |
D． |
paid |
He lost ______ new pen yesterday．（ ）
| A． |
him |
B． |
his |
C． |
hers |
D． |
her |
There ______ a post office and two restaurants across from the street．（ ）
| A． |
is |
B． |
are |
C． |
has |
D． |
have |