I don’t know whether you happen ____ that he has been away for two months.
. I strongly recommend that the information______ in my report____to our headmaster without delay.
. It was too dark, and I couldn’t _______ the words written on the blackboard.
. The fact of Madam Curuie’s_______ to the radiation for a long time ______ her poor health.
. I wonder __________ that made him so upset yesterday.
. A terrible earthquake broke out in Yushu, Xinjiang several days ago,_______ we stopped any entertainment on April 21, 2010