By the time Einstein was 14 years old, he ________ himself advanced mathematics.
#104517
A
has taught
B
taught
C
had taught
D
was teaching
推荐题目
A completely new situation will______ when a new tool comes into use.
#100806
A
arise
B
rise
C
raise
D
arouse
We first met on a train in 2000. We both felt immediately that we _________ each other for years.
#104591
A
knew
B
have known
C
had known
D
know
—Your colleague’s spoken English is quite good，Amy.—No wonder，as she________in the USA for two years.
#99402
A
worked
B
has been working
C
had worked
D
has worked
--Our English teacher is back home from Britain now.--Yes, she _____there for just three months.
#100924
A
has been
B
had been
C
is
D
was
People who are ______ drugs can’t go without them for a few hours , can they ?
#103413
A
addicted to
B
engaged in
C
satisfied with
D
related to