中科新闻网温泉招商推介词:看看这道选择题！8
来源：百度文库 编辑：中科新闻网 时间：2024/05/09 09:44:20
it is difficult_____a horse ________
a. to train;jumping b. training;forjumping c. to train;jump d. to train;tojump
a. to train;jumping b. training;forjumping c. to train;jump d. to train;tojump
D
be difficult to do
train sb (how) to do
D. train sb to do sth.
D
A
d