I really wonder____ he has posted me many parcels_____ we didn't work together.
| A．how ,after | B．why, when | C．when, before | D．why, since |
He had just fallen asleep ________ the telephone rang last night.
| A．when |
| B．while |
| C．after |
| D．since |
Even though his father didn’t ________ him to join the school football team, he did it finally.
| A．let |
| B．promise |
| C．hope |
| D．permit |
Since he downloaded a virus ________ into his computer, he can’t open the file now.
| A．by design |
| B．by accident |
| C．on purpose |
| D．by mistake |
It is said that the temperature is unusual mainly ________ global warming caused by human activities.
| A．on account of |
| B．by means of |
| C．in case of |
| D．in spite of |
—Does it rain a lot in this area?
—________, it hardly ever rains; the climate is like that of a desert.
| A．What’s more |
| B．In other words |
| C．On the contrary |
| D．As a result |