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 |
—— Look at the black clouds.It ＿＿＿＿＿＿ soon.
—— Sure.If only we ＿＿＿＿＿out.
| A．is raining； didn’ t come |
| B．is to rain； won’ t start |
| C．will rain； haven’ t started |
| D．is going to rain； hadn’ t come |
The children ＿＿＿＿＿＿ very quiet； I wonder what they ＿＿＿＿up to.
| A．were； are being | B．are being； are |
| C．are； do | D．are being； do |
Jim talked for about half an hour yesterday.Never＿＿＿＿＿ him talk so much.
| A．I heard | B．did I hear |
| C．I had heard | D．had I heard |
——＿＿＿＿＿ Betty this morning?
—— Not yet, but she is sure to be here before noon.
| A．Have you seen | B．Will you see |
| C．Do you see | D．Did you see |