Give the correct form of each verb in brackets to complete the following sentences
1. Some kinds of fruits in Vietnam (export) ..... to Europe every year
2. The liquid (heat) ...... to a boiling point
3. Nam is very tired now. He (study)...... in his own room since breakfast
4. You (hear) ...... from Mai recently?
5. My father ( not drive) ........ a car since that accident
6. That is the third time he (write)...... to her
7. Everything is going well . We (not have) ..... any problems so far
8. The meeting (hold) ....... in Hanoi next week
9. This program must be new so it should (test)...... carefully
10. It's nice to see you again . We ( meet) ...... each other before?