______the jungle did he realize that there was danger everywhere in it.
A: Upon entering
B: When he entered
C: Only after entering
D: After he had entered
A: Upon entering
B: When he entered
C: Only after entering
D: After he had entered
举一反三
- No sooner had he entered Harvard ______ his sister entered Yale. A: since B: after C: than D: before
- He was seen ______ the classroom this morning. A: to enter B: entering C: have entered D: enter
- He must be in the building because he was seen _________the building just now. A: enter B: to enter C: entering D: having entered
- He must be in the building because he was seen______the building just now. A: entering B: enter C: C. to enter D: having entered
- Not until John had heard the cry, _____________. A: he realized the dange B: did he realize the dange C: he did realize the dange D: the danger realized he