—Have you been to the United States?
—Yes, only once. I ________ there only for seven days.
-The meeting has begun, and ________ he will come.
-I am sure he will because he has to speak at the meeting.
-Look, the light is still on.
-Oh. I forgot ________.
-Who is in the chemistry lab?
-________.
选出对句子画线部分结构描述正确的选项
I think the most exciting thing you are going to do is the cameral ride through the Sahara Desert
---Maggie had a wonderful time at the party.
---________, and so did I.
How ________ did she make the success?
I can hardly believe the good news.