What an unforgettable experience! I'll write it down it is still fresh in my memory．
| A．since | B．while | C．after | D．until |
.________all his courage, he invites Celine to get off the train with him．
| A．To gather | B．Gathered | C．Gathering | D．Being gathered |
. _______of the household rubbish_______recycled or reused since the new technology was applied.
| A．Three-fourth; has | B．Three-fourth; have been |
| C．Three-fourths; has been | D．Three-fourths; have |
Write down the key words that you __________ your students to find in the passage.
| A．make | B．hope | C．suggest | D．expect |
I think you should complain __________,of course, you are happy with the way things are.
| A．if | B．unless | C．as | D．because |
._________in charge of the shopping center has upset him for quite some time.
| A．Left | B．Being left | C．Having left | D．To leave |