30. When you arrive, I ______ in reception for you.
| A．wait | B．am waiting | C．am going to wait | D．will be waiting |
We have such a long car journey tomorrow. Make sure we bring enough food and games _____ for 4 hours so the kids won’t get bored.
| A．lasted | B．lasting | C．to last | D．last |
______ the sound on the step, the boy rushed out to see if his mother had come back.
| A．To hear | B．Hearing | C．Heard | D．Hear |
His answer was _______, so no one could make out what he meant.
| A．ambiguous | B．unconscious | C．transparent | D．explicit |
_______ you don’t stay out too late, you may go to the party. But remember to be back here no later than 11:30 pm.
| A．Now that | B．Until | C．Provided that | D．Although |
Unfortunately, when I dropped in, Dr. Green ______, so we only had time for a few words.
| A．just left | B．has just left | C．had just left | D．was just leaving |