The engineers must have worked out the design by the end of last week，_______？
| A．mustn’t they | B．hadn’t they |
| C．haven’t they | D．didn’t they |
Nowadays，it is common to see people staring at their mobile phones instead of reading a real book，＿＿＿＿＿＿many experts are worried．
| A．when | B．for which | C．where | D．about which |
Feng Xiaogang，＿＿＿＿＿＿＿＿＿by many as a leading director，left his handprint at the TCL Chinese Theatre．
| A．to recognize | B．recognized | C．having recognized | D．to be recognized |
It’s so cold today．If it should get warmer this afternoon，I＿my car．
| A．would have washed | B．would wash | C．must have washed | D．must wash |
一Excuse me，may I have a word with Mr. Jackson？
一I’m afraid he’s not＿now．He’s having a meeting upstairs．
| A．comfortable | B．suitable | C．available | D．acceptable |
Having devoted his life to the realization of racial equality，former South African President Nelson Mandela＿＿＿on December S，2013．
| A．passed away | B．had passed away | C．has passed away | D．passes away |