_______ SOME SCIENTISTS USE LASERS FOR MILITARY PURPOSES, SHE H...
Câu 98.
_______ some scientists use lasers for military purposes,
She hasn"t received a single letter from him _______
they both left school.
others use them in
medicine.
A. as
B. because
C. since
D. now that
A. When
B. While
C. Until
D. However