________ businesses rely more and more in technology to improve productivity, the demand for IT professionals continues to increase. (2017,12. A)
A. While
B. Unless
C. Although
D. As
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With the help of their professor, these students will learn to program their robot to do _______ they want it to do.(2017,12. A)
A. Whatever
B. wherever
C. whenever
D. whichever
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
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