【单选题】
In January,2004,the United States successfully launched Spirit,a Mars Exploration Rover(火星控测飞行器),________a new milestone(里程碑) in the history of mankind.
①
it marked
②
marking
③
marked
④
to mark
【单选题】
In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover（火星控测飞行器）, ____ a new milestone（里程碑）in the history of mankind.
①
it marked
②
marking
③
marked
④
to mark
【单选题】
while（fabs（t）<1e-5）if（!（s/10））break；循环结束的条件是（）.
①
t=1e-5∣∣t=-1e-5∣∣s-10s10
②
fabs（t）＜1e-5!s/10
③
fabs（t）＜1e-5
④
s/10==0
【单选题】
After failing the exams three times, Jack realized that he’d never ____in English.
①
see to it
②
attain it
③
catch it
④
make it
【单选题】
4.After getting ____ in classroom activities, the student managed to overcome his shyness.
①
interested
②
bored
③
involved
④
to know
【判断题】
After the First World War, the United States was no longer isolated in either politics or tradition.
①
正确
②
错误
【单选题】
After filling out this form, please don’t forget to______ your name.
①
sign
②
sigh
③
scribble
④
jot