China began to open to the outside world in the late 1970s. _________, there have been great changes in the country.
What ___ interesting book it is?
English is___ useful language in ___ world.
There is ___ orange in the bottle.
—I’d like you to tell me something about Shen Nongjia. —I’m sorry, but neither Jack nor I ____ there.
—Do you know who took the students to the old people’s home, Tony? —Well, Mr. Smith _______.