They have gone to Beijing for a meeting. They will be back ________.
A:after a few weeks
B:in a few week's time
C:in a few weeks' time
D:for a few weeks
根据句意和汉语提示,写出单词的正确形式。
You won’t find paper cutting difficult _____you keep practicing it.
Look! Lucy is ________ a new red dress. She is beautiful today.