We have planted some more flowers around the campus, which __________ the beauty of the whole school.
| A．adds to | B．adds up |
| C．adds up to | D．is added to |
I would have gone to my cousin’s birthday party last night, but I ______ available.
| A．was | B．had not been | C．was not | D．would not be |
______ is often the case in science, there is no simple answer
| A．That | B．As | C．When | D．Where |
The airport ______ next year will help promote tourism in this area.
| A．having been completed | B．completed |
| C．being completed | D．to be completed |
______ you said at the meeting describes a bright future for the company.
| A．When | B．How | C．What | D．That |
I got to the office earlier that day, ______ the 7:30 train from Paddington.
| A．caught | B．to have caught | C．to catch | D．having caught |