，please start the work tomorrow.
| A．If you are convenient | B．If it is convenient for you |
| C．If it is convenient of you | D．If convenience |
Partly ______ about his lost love, he buried himself in office work.
| A．forgetting | B．to have forgot | C．to forget | D．having forgot |
— Why don’t you stay a little longer？
— ______, but I really should be on my way.
| A．I wish I could | B．That’s too bad | C．Forget about it | D．It is my pleasure |
Learning to care for a pet helps a child grow into an adult who feels responsible for ______
dependent on him.
| A．who | B．those | C．ones | D．whoever |
14. Be quiet, kids. You’ll have to wait ______ your names are called.
| A．while | B．until | C．and | D．unless |
The path to dreams may not be smooth and even at great cost, but ______ on to them.
| A．keep | B．go | C．hold | D．pass |