Someone is ringing the doorbell. Go and see ___________.
| A．who is he | B．who he is | C．who is it | D．who it is |
The accident is reported to have occurred __________ the first Sunday in February.
| A．at | B．on | C．in | D．to |
The trouble is ____ we can not find such an expert.
| A．why | B．that | C．where | D．/ |
People may have different opinion about Karen, but I admire her. ______, she is a great musician.
| A．After all | B．As a result | C．In other words | D．As usual |
I am sure ____ you said is true.
| A．what | B．that | C．which | D．who |
There was such long queue for coffee at the interval that we ________ gave up.
| A．eventually | B．unfortunately | C．generously | D．purposefully |