【单选题】
The police wondered how did the thieves gain ( ) into the bank.
【单选题】
This lecutre is ( ) informative.
【单选题】
Reading can ( ) our intelligence.
【单选题】
( ) simplicity, lets divide the discussion into two parts.
【单选题】
All his hard work have paid off for he was ( ) by the famous university.
【单选题】
Cell phone is a cheap ( ) of communication.
【单选题】
Did you forget your writing ( )?
【单选题】
Daily doses of vitamin C may be ( ) for your health.
【单选题】
The price is high ( ) the output is rare.
【简答题】
将句子翻译成英文:他毕生致力于帮助穷人。(dedicate ones life to doing )