The tomato juice left brown ____ on the front f my jacket．
| A．spots | B．points | C．tracks | D．traces |
He _____ English for ten years by the time he takes the examination.
| A．will have been studying | B．would have been studying |
| C．will study | D．studied |
I knew I could not finish the homework _____.
| A．by the time he had come | B．before he came |
| C．until he has come | D．when he comes |
—Where is Peter? —He _____ to Shanghai.
| A．went | B．had gone | C．has been | D．has gone |
My brother _____ the Youth League since 1990.
| A．joined | B．has been in | C．has joined | D．had joined |
I haven’t seen her _____.
| A．two weeks ago | B．since two weeks |
| C．for two weeks | D．before two weeks |