Tenses Worksheet For Class 10
Fill in the blanks with an appropriate tense form. This tenses worksheet is useful for students of classes 9 and 10. American biologist Craig Venter, who ………1…………. (founded / had founded / has founded) Celera Genomics in 1998 to sequence the human genome, …………2………….. (say / says / was saying) that he has built a …