I don’t know if Jack ______back today. If he____back, I’ll call you.
A. will come; will come B. comes; will come C. comes; comes D. will come; comes
_______nice the ice cream looks ! I can’t wait to taste it.
A. How a B. How C. What a D. What
Bikes are ____ in our city.
A. more popular and more popular B. most popular and popular
C. more popular and most popular D. more and more popular
They wonder ________ robots will make humans lose their jobs or not.
A. that B. if C. whether D. so
_____ he is very young, _____ he knows a lot about science.
A. Because, so B. Though, but
C. When, and D. Although, /
They find ________difficult to understand the teacher when she talks.
A. it B. that C. this D. its
