In the past decades, sea ice ______ in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |
It was in the small house _______ was built with stones by his father _______ he spent his childhood.
| A．which; that | B．that; where | C．which; which | D．that; which |
--- How often do you eat out?
--- _______, but usually once a week.
| A．Have no idea | B．It depends | C．As usual | D．Generally speaking |
How I was _______when I heard the _______ news!
| A．excited; excited | B．excited; exciting |
| C．exciting; exciting | D．exciting; excited |
_______, a learned man makes fewer mistakes in life than a man without knowledge.
| A．In general | B． As general | C． On general | D．At general |
They made a scientific approach ______ the subject.
| A．at | B．in | C．to | D．of |