12. -- Why didn’t you come to see the film with your parents last weekend?
-- I _____ my lessons for the month- exam.
| A．was preparing | B．prepare | C．prepared | D．have prepared |
In Singapore, people______eating or drinking on the subway can be fined up to 500 Singapore dollars.
| A．having caught | B．catching |
| C．caught | D．to catch |
The zookeeper was really annoyed with me.
— How could he have been if you______stones at the animals?
| A．didn’t throw | B．don’t throw |
| C．hadn’t thrown | D．haven’t thrown |
—What do you do as a volunteer in North Africa?
—__________! There are many poor people who need a lot of help.
| A．None | B．Something |
| C．Little | D．Everything |
They’ve moved to a different house_________their children can attend a better school.
| A．in case | B．so long as |
| C．so that | D．even though |
The Alibaba Group, _____was founded in 1999, has become China’s largest e-commerce company.
| A．what | B．which | C．whose | D．whether |