1) There...not a cloud in the sky
a. Is
b. Were
c. Will be
2) His son...good in foreign languages
a. Am
b. Were
c. Is
3) This train...in London in two days
a. Will be
b. Was
c. Have Been
4) Where...Mike?
a. Are
b. Is
c. Am
5) Her parents...on pension
a. Was
b. Has been
c. Are