—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
Stephen Hawking believes that earth is unlikely to be the only planet life has developed gradually.
It's good feeling for people to admire the Shanghai World Expo that gives them pleasure.()
In this lecture, I can only give you a purelyview of how we can live life to the full and make some suggestions about the future.
After the earthquake, the first thing the local government did was to providefor the homeless families.
I wasn't blaming anyone; Isaid errors like this could be avoided.