He ＿＿＿articles for our wall-newspaper these three years, and he ＿＿＿about forty articles.
| A．has been writing； has written | B．has been writing； wrote |
| C．is writing； has been writing | D．has written； has written |
I’m ______ captain of the class team at school and I’m also ______ member of the Senior High team.
| A．不填; a | B．a; a | C．the; the | D．the; 不填 |
From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there.
| A．when | B．until | C．since | D．before |
_____ unemployment and crime are high, it can be assumed that the latter is due to the former.
| A．Before | B．Where | C．Unless | D．Until |
_____the Internet is of great help, I don’t think it ‘s a good idea to spend too much time on it.
A
. If B. While C. Because D. As
It was a matter of________ would take the position.
| A．who | B．whoever | C．whom | D．whomever |