— Why didn’t you come to Mike’s birthday party yesterday?
— Well, I ____, but I forgot it.
| A．should | B．must | C．should have | D．must have |
The problem requires ______.
| A．studying with great care | B．to study carefully |
| C．to be studied without carelessness | D．taking great care of studying it |
_____, she burst into tears.
| A．Deeply moved | B．Deeply moving |
| C．As she deeply moved | D．As she was deeply moving |
I couldn't help _____ when I heard the joke.
| A．being laughed | B．laughing | C．to be laughing | D．to laugh |
She was noticed ______ the shop.
| A．to enter | B．enter | C．having entered | D．entered |
I remember _____ someone ____ the umbrella away.
| A．to see, take | B．having seen, to take |
| C．to see, to take | D．having seen, take |