英语翻译～

Question

他没让我知道他所做出的决定（in the dark）
他正忙着备考，所以不能来参加我们的聚会。（be busy doing）
不要羡慕别人的成功。只要你努力，你也能成功（envy）
我们盼望着收到外教的来信，告诉我们他的冒险经历（look forward to）
你最好向全体同学宣布一下结果，以防他们没有看到通知（in case）

Answer 1

He did not let me know that he made the decision (in the dark)
Note that he is busy, so we were not able to participate in the meeting. (Be busy doing)
Do not envy other people's success. As long as you are, you can be successful (envy)
We look forward to receiving a letter from the speaker, told us that his adventure (look forward to)
You'd better look to all the students announced the results in case they have not seen the notice (in case)

Answer 2

Do not envy other people's success. As long as you are, you can be successful (envy)
We look forward to receiving a letter from the speaker, told us that his adventure (look forward to)
You'd better look to all the students announced the results in case they have not seen the notice (in case)

Answer 3

Many foreign visitors want to visit the Great Wall a swim, they know not "the". (version), As long as you have confidence, you will be in a modern society competition successfully. (but) No matter what happens, they will sack. (no matter) The accident left us aware of safety problems should not be ignored. (am cut-out) All the Windows open, he fell asleep. ()?