2020-11-27到2021-01-15
Week 4 Concept of Time and Punctuality Test 4
1、 After they ____ the first super computers in the 1940s, scientists and engineers began to develop ways to create networks.
A:create
B:created
C:have created
D:has created
答案: created
2、 Harvey finished ____ his research paper, but he needed to check it before submitting it to the professor.
A:to type
B:typed