A series of attempts ______made, he came to a successful solution of the problem.
A: to be
B: had been
C: were
D: having been
A: to be
B: had been
C: were
D: having been
举一反三
- The decision ______ , the next problem was how to make a good plan. A: having made B: had made C: having been made D: had been made
- The decision _______, the next problem was how to make a good plan. A: having made B: having been making C: having been made D: been made
- 他提出了一个真正具有创意的解决问题的办法。 A: He came up with a really innovative solution to the problem. B: He came up with a really successful solution to the problem. C: He came up with a really meaningful solution to the problem.
- ______strong and tall, he can be a successful sportsman. A: Being B: To be C: Been D: Having been
- He ______ his breakfast when the morning post came. A: had B: have been having C: had been having D: was having