The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.
| A．held on | B．worked out | C．touched on | D．kept out of |
The man didn’t knowthe thief broke into the house and stole all his valuable things.
| A．it was when that | B．when was it that |
| C．that it was when | D．when it was that |
Hardlyhome when it began to rain.
| A．I got | B．did I got |
| C．I had got | D．had I got |
In 1932, she became the first womanalone across the Atlantic.
| A．to fly | B．flying | C．having flown | D．flew |
what many people might assume, evidence shows that sharks seldom attack humans.
| A．Thanks to | B．Due to |
| C．According to | D．Contrary to |
it is going to clear up keeps me wondering.
| A．That | B．If | C．Whether | D．Which |