(2019原创)Our physics teacher told us that water ________ at 100 ℃.
A.boils B.boiled
C.has boiled D.is boiling
(2019原创)Susan is interested in playing the violin. She ________ the violin class twice a week.
A.takes B.took
C.is taking D.was taking
(2019原创)Sorry, I can't go to help you. I ________ Helen with her history.
A.help B.was helping
C.have helped D.am helping
If someone ________ stones at you, don't throw back. Use them to build your own foundation instead.
A.throws B.threw
C.is throwing D.has thrown
(2018唐山丰润区一模)Just wait for a moment. I________ an article.
A.write B.wrote
C.am writing D.have written
(2018唐山市路北区一模)My grandma________looking at that photo on the wall. It reminds her of her childhood.
A.enjoys B.enjoyed
C.was enjoying D.will enjoy
