Ответ:

1. Have a rest now you have been working too hard lately.

2. You are shivering have you been standing in this cold long?

3. Her hands are red and wet. She has been scrubbing the floors for three hours.

4. The children are quite voiceless. They have been singing at the top of their voices since morning.​

Объяснение:

1have a rest now (you/work too hard/lately)

YOU HAVE BEEN WORKING TOO HARD LATELY.

2. you are shivering (you/stand/in this cold/long?)

HAVE YOU BEEN STANDING IN THIS COLD LONG?

3. her hands are red and wet. (she/scrub/the floors/for three hours)

SHE HAS BEEN SCRUBBING THE FLOOR FOR THREE HOURS.

4. the children are quite voiceless. ( they/sing at the top of their voices/since morning)​

THEY HAVE BEEN SINGING AT THE TOP OF THEIR VOICES SINCE MORNING.