39
To sum up, when (talk) ____ about Smart Cities, I am talking about environmentally friendly cities.

27
They are trying to work out a plan by ____ they can fulfill the project ahead of time.
(A) which
(B) what
(C) that
(D) when

39
While (speak) ____ about the Internet of Things, he mentioned the steps taken by our company.

31
The countries in ____ English is spoken can be grouped into different categories.
(A) what
(B) where
(C) that
(D) which

35
The company policy says you may not use your cell phone to receive or place calls while (drive) ____.

27
Jane learnt spoken Chinese while ____ English in Guangzhou.
(A) teach
(B) teaching
(C) taught
(D) was teaching

39
You must fully charge the battery before (use) ____ your phone for the first time.

36
They believe that a picnic with friends is a way to have fun without (spend)____ too much money.

33
There are a few things you should know about a sales job before____ it.
(A) take
(B) took
(C) taking
(D) to take

28
A modern city should provide an environment in____information flows rapidly and easily.
(A) which
(B) what
(C) that
(D) where

38
The more people you meet, especially while (do)____volunteer work, the more contracts you’ll have.

34
The digital age in____we live today is an age of constant change.
(A) which
(B) when
(C) that
(D) where

29
You have to consider a company structure when ____your own business.
(A) start
(B) starting
(C) started
(D) to start

29
Most of them said they felt anxious when____ a new job.
(A) search for
(B) searching for
(C) searched for
(D) were searching for

37
If you choose not to receive those emails, please let us know by (send)____ us a message.

37
Only by (create) ____ a clean environment can we truly encourage more tourists to come.

37
Photography has changed our way of____ (view) the world.

32
We really appreciate our working environment, in ____ there was open, friendly workplace communication.
(A) how
(B) what
(C) whom
(D) which