Happy times usually pass quickly without ______.
| A．noticing | B．being noticed |
| C．having noticed | D．to be noticed |
---- Water can dissolve almost anything and give nutrients to creatures.
---- Yes, and that’s one of its __________.
| A．characters | B．properties | C．qualities | D．abilities |
The student couldn’t _________what the teacher was trying to explain.
| A．know | B．grasp | C．learn | D．get |
It won’t be long before we _____________ a way to overcome the difficulties.
| A．work out | B．make out | C．turn out | D．bring out |
Whenthe future, many people will imagine a lifehigh-tech devices.
| A．thinking of, full of | B．thought about, full of |
| C．thought of, filled with | D．thinking about, filled with |
---Do you think he will do me a favor?
---As far as I know, he is the last one ___ others. He ___ be prepared to give you a hand, though.
| A．to help, might | B．helping, must | C．to help , can | D．helping, should |