—Is Jack on duty today?
—It __________ be him. It’s his turn tomorrow.
| A．mustn’t | B．won’t |
| C．can’t | D．needn’t |
With time going by, we have come to realize that creativity is it takes to keep a nation highly competitive.
| A．what | B．how | C．why | D．that |
A kind-hearted passenger paid for Tim’s ticket, without which he _____ the last train.
| A．couldn’t have caught | B．didn’t catch |
| C．couldn’t catch | D．hadn’t caught |
_____ increasing public discontent, the government is determined to push the bill through.
| A．In terms of | B．As a result of |
| C．In favor of | D．In spite of |
General Secretary, Xi Jinping, stressed that cross－strait cooperation would be strengthened________ the two sides could agree to oppose Taiwan independence．
| A．unless | B．even if |
| C．as long as | D．until |
Little did the teacher imagine that a student good at maths _____ have failed in the exam.
| A．might | B．should | C．need | D．would |