1. Though ________, running does us much good.
A. tired B. tiring C. we tired D. it gets tired
【答案】B
2. Do you consider it any good ________ psychology?
A. to learn B. learning C. learned D. having learned
【答案】B
3. Although ________ of danger, tourists can’t help taking photos near the cliff.
A. having warned B. warning C. warned D. warn
【答案】C
4. _____ with so much trouble, we failed to complete the task on time
A. To face B. Faced C. Face D. facing
【答案】B
