Simple present/progressive and Simple past/ progressvie

While they__________Paris last year, thousands of tourists saw Leonardo da Vinci's Mona Lisa at the Louvre.

• were visiting
• visit
• are visiting
• would visit

Tags

CCSS.L.3.1E

CCSS.L.4.1B

CCSS.L.5.1.B-D

CCSS.L.5.1C

CCSS.L.5.1D

At one time the telephone system in the United States was a monopoly: different companies didn't ___________ offer telephone service.

• use
• using
• would
• use to

Tags

CCSS.L.4.1C

CCSS.L.9-10.1B

Jurors often deliberate for many hours before they __________ a decision.

• are making
• make
• made
• were making

Tags

CCSS.L.3.1E

CCSS.L.4.1B

CCSS.L.5.1.B-D

CCSS.L.5.1C

CCSS.L.5.1D

The number of cases of asthma ______ these days, perhaps partly because more people own cats.

• increase
• is increasing
• was increasing
• were increased

Tags

CCSS.L.3.1E

CCSS.L.4.1B

CCSS.L.5.1.B-D

CCSS.L.5.1C

CCSS.L.5.1D

Several people who refused to leave, ______ on Mount St. Helens when it erupted in 1980.

• still live
• still living
• are still living
• were still living

Tags

CCSS.L.3.1D

CCSS.L.4.1B

CCSS.L.5.1.B-D

CCSS.L.5.1C

CCSS.L.5.1D

Nowadays, the average American routinely __________ about 20 hours of TV per week.

• watch
• watches
• watched
• watching

Tags

CCSS.L.3.1E

CCSS.L.4.1B

CCSS.L.5.1.B-D

CCSS.L.5.1C

CCSS.L.5.1D

Scientists now _______ that it is possible to clone organisms.

• know
• are knowing
• knew
• have been knowing

Tags

CCSS.L.1.1E

CCSS.L.3.1A

CCSS.L.K.1B

George Balanchine ______ the New York city Ballet before 1948.

• wasn't establishing
• didn't establish
• doesn't establish
• used to establish

Tags

CCSS.L.3.1D

CCSS.L.4.1B

CCSS.L.5.1.B-D

CCSS.L.5.1C

CCSS.L.5.1D

Before Pasteur developed his theories, people __________ that life could arise spontaneously

• were thinking
• used to think
• would think
• think

Tags

CCSS.L.5.1C

CCSS.L.5.1D

Where is the mistake?

When  (A) oxygen combines  (B) with hydrogen, (C)it sometimes is creating(D)  water. 

• A
• B
• C
• D

Tags

CCSS.L.3.1A

CCSS.L.3.1D