EX 3: 21->40

It was difficult _________ a date which was convenient for everyone.

• making

• to make

• make

• made

___________ only three hours, I can hardly focus on my work.

• Having slept

• was slept

• slept

• sleeping

New Zealand was the first country ________ women the vote

• who gave

• that give

• to give

• giving

Marleen is the only girl ________ her opinion about going to historical sites.

• to raise

• raising

• raised

• raises

After ___________ with the master's degree, Johny was on cloud nine.

• having been granted

• being granted

• having granted

• granting

He regrets __________ so much money on unnecessary things.

• spend

• to spend

• having spent

• spent

It's essential for us ____________ the Vietnam's cultural heritages.

• preserving

• preserve

• to preserve

• preserved

Mohamed was the last person ________ about the secret of Pyramids.

• knowing

• to know

• knew

• to knowing

___________ a perfect trip to famous heritages, they visited many tourism websites.

• Planning

• To plan

• To planning

• Planned

Son Doong Cave is the largest cave __________ in Phong Nha-Ke Bang National Park.

• discover

• discovering

• to discover

• to be discovered