Some children were seen _______in the garden all the morning. It must have been _______who picked the flowers.

A. playing; they   B. to play; they   C. playing; them    D. play; them

Some children were seen _______in the garden all the morning. It must have been _______who picked the flowers

1. A.
   playing; they
2. B.
   to play; they
3. C.
   playing; them
4. D.
   play; them

Some children were seen _______in the garden all the morning. It must have been _______who picked the flowers.

Some children were seen ________ in the garden all the morning. It must have been ________ who picked flowers.

[　　]

Some children were seen playing here in the garden all morning．It must have been ________ who picked the flowers．

1. A.
   they
2. B.
   them
3. C.
   he
4. D.
   him