1) found) by? it found) by local authorities thirty-five years ago. 2)how many to keep) in this zoo last year? last year we keep) more than one hundred animals. any measures to protect this are from pollution take) yet? no, discuss) at the moment. write) the letters already ? the write) at the moment. (to solve) this problem yet? no, it solve) tomorrow.
It has been found by local authorities thirty-five years ago.
2. was keeping
had keeped
2. Kept, kept
3. Have taken, are discussing
4. Have written, are writing
5. Have solved, is solving