Achieving a high degree of proficiency(精通）in English as a foreign language is not a mysterious _______ without scientific basis.
#11851
A
process
B
practice
C
procedure
D
program
推荐题目
The wet weather will continue tomorrow, when a cold front________ to arrive.
#14207
A
will be expected
B
is expecting
C
expects
D
is expected
Research shows that humans ______ from selfish to unselfish behavior when they are watched.
#11684
A
tell
B
switch
C
range
D
distinguish
The meeting was put off because we ________ a meeting without John.
#12900
A
objected having
B
were objected to having
C
objected to have
D
objected to having
(2013·陕西宝鸡模拟)After Queen Elizabeth officially opened the 2012 Summer Olympics, London became the first city ________ three Olympic Games in history.
#11364
A
to have hosted
B
hosting
C
hosted
D
having hosted