----Jack can’t concentrate on his lessons recently.
----Yes, that may ________ why he did so badly in the last test.
| A．answer for | B．account for |
| C．call for | D．stand for |
Only by seizing every possible_____ to practice can you possibly hope to improve your spoken English.
| A．solution | B．opportunity | C．experience | D．touch |
—Why do many people keep dogs as pets?
—Because they are our ____ friends and they never desert their masters.
| A．wise | B．brave | C．loyal | D．handsome |
The survey ____ in our school last month shows that about three percent of the students are addicted to the Internet games.
| A．conducted | B．was conducted | C．conducting | D．to be conducted |
You _____ read a book in the sun—it'll do harm to your eyes．
| A．couldn't | B．wouldn't | C．needn't | D．mustn't |
A fire broke out in the building at 7:30 on Tuesday morning, ____ in the death of a young girl.
| A．having resulted | B．resulted | C．being resulted | D．resulting |