Your order will be fufilled within 7days of the date of your order, _________ there are exceptional circumstances. (2017, 6. A)
A. so
B. unless
C. while
D. before
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Please don't leave your seat ________ the plane coems to a full stop. (2017,6 A)
A. if
B. since
C. because
D. until
My boss refused to give me a pay, no matter _______ hard I worked. (2016,12. A)
A. how
B. where
C. what
D. when
We will inform you of the result _______ the program is approved by the board. (2016,6 A)
A. in order that
B. as if
C. even though
D. as soon as
Parkign can sometimes be a problem, so try to avoid peak periods ______ you travel by bus.(2015,12.A)
A. until
B. although
C. unless
D. since