People resumed their interest in natural gas as a fuel as a result of ___________ of the late 1960s and early 1970s.

A．See the campus dentist first.
B．Touch something less sweet.
C．Have a sound sleep right away.
D．Not touch anything sweet.

A．She is designing another Website.
B．She couldn’t do BBS.
C．She has no time.
D．She hasn’t done any website design before.