【判断题】
黑色(Black)的颜色属性用16进制数表示是#FFFFFF。
【单选题】
Train services are now back to ____after last week’s strike.?
【单选题】
All the flights ____ because of the snowstorm, we had
to take the train instead.
【多选题】
You can train yourself to remember better. Here are some_________ .
【多选题】
We should train them to_____________ reference books (参考书) .
【单选题】
Xi an is only a 5-hour journey __ Beijing by the express train.
【单选题】
All the flights _____because of the snowstorm, we had to take the train instead.
【单选题】
Five minutes earlier, __________ we could have caught the last train.