Mr. Smith gradually _____ a knowledge of the subject.
| A．attained | B．achieved | C．required | D．acquired |
____he lost the game was _____we hadn’t expected.
| A．That; which | B．That; what | C．Whether; that | D．Why; that |
---We can’t expect _____blue sky unless we create ____less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
---I am going to Spain for my holidays tomorrow.
--- ________.
She missed the plane, ________driving very fast to the airport.
| A．despite | B．unless | C．though | D．without |
She pretended _______when I came in.
| A．to read | B．read | C．to be reading | D．reading |