The researcher _ exploring the territory _ last December, and now he is ready to draw a map.
▪️ has been / for
▫️ had been / for
▪️ has been / since
▫️ had been / since
▪️ has been / for
▫️ had been / for
▪️ has been / since
▫️ had been / since
To estimate - ?
▪️ Удивляться
▫️ Систематизировать
▪️ Подозревать
▫️ Оценивать
▪️ Удивляться
▫️ Систематизировать
▪️ Подозревать
▫️ Оценивать
Jane, ___ mother is a physician, is very good at biology.
▪️ whom
▫️ who
▪️ whose
▫️ which
▪️ whom
▫️ who
▪️ whose
▫️ which