Liberia has seen more Ebola deaths than the other affected countries but there are now some _______ signs.
| A．efficient | B．positive |
| C．individual | D．negative |
Mary is very late, she ______.
| A．may miss her train | B．may have missed her train |
| C．must miss her train | D．could miss her train |
Most of the artists _______ to the party were from South Africa.
| A．invited | B．to invite | C．being invited | D．had been invited |
“What did you do in the garden?”
“I watched my father ______ his motorbike.”
| A．to repair | B．repaired | C．repairing | D．repairs |
I don’t allow ______ in my office and I don’t allow my family ______ at all.
| A．to smoke…smoking | B．smoking…to smoke |
| C．to smoke…to smoke | D．smoking…smoking |
_____ more attention, the trees could have grown better.
| A．Given | B．To give | C．Giving | D．Having given |