1.they left us _______ saying anything.
2. he waited _________ her for two hours in cold rain.
3. ______ of buying a new one, i will keep my old car because of the cost.
4. the law will take effect _______ the beginning of the new year.
a. at b. by c. with d. during
5. the project caused layoffs ________ the consulting business.
a. into b. as c. during d. throughout