She took a break after she practised for two hours.

A. was practicing
B. had been practising
C. has practised
D. had practiced

We had cleaned the car and the garage on Sunday morning.

A. were cleaning
B. cleaned
C. have been cleaning
D. had been cleaning

The canyon is protected as a UNESCO World Heritage Site, and a part of Durmitor National Park.

A. and was a part of
B. and is a part of
C. and has been a part of
D. and had been a part of

We were watching a match while the electricity went off for the third time in a day.

A. No change
B. watched a math
C. have been watching a match
D. had watched

My mother is finishing baking the cake when my friend arrived for the Christmas party.

A. finished baking the cake when
B. finished baking the cake before
C. had finished baking the cake when
D. was finishing baking he cake before

The recent discovery of gold by archaeologists has provided information that suggests that the wealth accumulated by ancient Indians was greater than believed.

A. No change
B. is believed
C. was believed before
D.had been believed

An attempt to ratify the Equal Rights Amendment, begun almost two decades ago, has been unsuccessful.

A. began almost two decades ago, has been unsuccessful
B. begun almost two decades ago, had been unsuccessful
C. begun and had been unsuccessful, almost two decades ago
D. begun almost two decades ago, has been unsuccessful

Europa was a naval power that conquered Africa 9000 years before the laws of Europa had been developed.

A. No change
B. that conquered Africa 9000 years before the laws of Europa were developed.
C. that conquered Africa 9000 years before the laws of Europa was developed.
D. that was conquering Africa 9000 years before the laws of Europa were developed.