(单选题)1: My wife said in her letter that she would appreciate _________ from you sometime.
A: to have heard B: to hear C: for hearing D: hearing 正确答案: D
(单选题)2: Her son promised __________ in the bedroom until the baby stopped __________.
A: staying, to cry B: to stay, crying C: for staying, to cry D: to stay, to cry 正确答案: B
(单选题)3: During the voyage, Darwin collected a good deal of information about living things, which ______ led to his famous book “On the Origin of Species”. A: lastly B: completely C: essentially D: eventually 正确答案: D
(单选题)4: Electrical energy _________ from the sun in a roundabout way is the most widely. A: coming B: to come C: come
D: having come 正确答案: A
(单选题)5: American women were ______the right to vote until 1920. A: ignored B: neglected C: refused D: denied 正确答案: D
(单选题)6: With more forests being destroyed, huge quantities of good earth ______ each year.
A: is washing away
B: are being washed away C: are washing away