The engineers are so busy that they have zero time for outdoor sports activities, _______they have the interest.
Fetch a doctor! The patient _____.
| A．was dead | B．has dead | C．died | D．is dying |
By August the flowers _____.
| A．die | B．will die | C．are to die | D．will have died |
The boy _____ out to play until he had finished his homework.
| A．went | B．would go | C．doesn’t go | D．didn’t go |
Water _____ at 100 degrees centigrade.
| A．boiled | B．boils | C．has boiled | D．was boiling |
–English has large vocabulary, hasn’t it?
–Yes, _____ more words and expressions and you will find it easier to read and communicate.
| A．Know | B．Knowing | C．To know | D．Known |