I ______ have been more than six years old when the accident happened.
| A．shouldn’t | B．couldn’t | C．mustn’t | D．needn’t |
.
You can come here to ask me _____ if you have any questions.
| A．at one time | B．at your time | C．at any time | D．all the time |
.
Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.
| A．to see | B．to be seen | C．seeing | D．see |
.
Tom will succeed _____ your property after your death,but I don’t think he is______success.
| A．in, / | B．at , a | C．to , a | D．from, a |
.
--- Can I take these boxes for you?
--- ___ .
| A．Yes, I can manage | B．It’s a pleasure | C．Thanks, that’s very kind | D．No, please |
.
Though Lucy is only ___ 11-year-old girl, she has ___ gift for singing.
| A．a; a | B．an; the | C．an; a | D．a; the |