He found it hard for Alan to focus on his teachers for longer than five minutes, _________ if the lecture was boring. 
#23920
A
extremely
B
especially
C
basically
D
naturally
推荐题目
We are eating________vegetables per person today as they did in 1910.
#22135
A
more than twice
B
as twice as many
C
twice as many as
D
more than twice as many
Not _______, the process of choosing names varies widely from culture to culture..
#23194
A
obviously
B
normally
C
surprisingly
D
particularly
Two middle-aged passengers fell into the sea. _______, neither of them could swim.
#22310
A
In fact
B
Luckily
C
Unfortunately  
D
Naturally