At times the balance in nature is ______，resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |
It was foolish of him to ______his notes during that important test, and as a result, he got punished.
| A．stick to | B．refer to | C．keep to | D．point to |
The patient insisted that he_______ ill and ________ to the hospital.
| A．wasn’t, wasn’t sent | B．wasn’t, not be sent |
| C．shouldn’t be, wasn’t sent | D．wasn’t, shouldn’t send |
Now that she is out of job, Lucy ___ going back to school, but she hasn’t decided yet.
| A．had considered | B．has been considering |
C．considered | D．is going to consider |
—What a large crowd!—They ______ in the cold wind for hours; the famous star will come today.
| A．waited | B．were waiting |
C．are waiting | D．have been waiting |
Young people always look into the future, while old people like to look back into the past. This is ______ both men and women.
| A．true of | B．different from | C．similar to | D．difficult in |