问题
Alice, you look puzzled, Have you understood it?—No．I _____another problem just now
A:l have thought of
B:am thinking of
C:had thought of
D:was thinking of
B:am thinking of
C:had thought of
D:was thinking of
正确答案是：
同类题型
If you are able to donate money, ______ happiness and share knowledge, you will be successful.
Y0u had better not discuss the problem at the meeting．You may discuss it tea
I admired my classmate Linda very much ________ her prettiness, she was smart and helpful
May I borrow some English newspapers—_____
If the price of oil remains ________ for the rest of 2013, I will consider buying a new car.