_________ caused the accident is still a complete mystery.
| A．What | B．That |
| C．How | D．Where |
Nobody but doctors or nurses and those ____ by Dr Hu ____ to enter the patient’s room.
| A．invited; is allowed | B．are invited; are allowed |
| C．being invited; allowed | D．invited; are allowed. |
Zhu Zhiwen，________ grassroot singer，was ________ real hit in 2012.
| A．the；/ | B．a；the | C．a；a | D．the；a |
You’d better tell your mother not to make a call while driving because her car __missed a cyclist when she was on the way to work the other day.
| A．closely | B．merely |
| C．narrowly | D．hardly |
It wasn’t until near the end of the letter ______ she mentioned her own plan.
| A．where | B．that | C．why | D．when |
-- How many people are expected to come to your party tomorrow afternoon?
-- I send out thirty invitations but one third _____.
| A．didn’t show up | B．won’t show up |
| C．hadn’t showed up | D．doesn’t show up |