30:17
STRUCTURE
2335 Views
01:56
READING COMPREHENSION &VOCABULARY
1277 Views
01:52
The Form of Irregular Verbs
1285 Views
01:59
The Tense of the Passive Voice
1365 Views
09:31
Changing from Active into Passive
1135 Views
07:20
The Form of the Passive Voice
1349 Views
03:29
What is the Passive Voice?
1388 Views
03:45
The Form of the Active Voice
1349 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1703 Views
03:20
Since vs For
1487 Views
04:50
Have or Has
1301 Views
00:49
Key Words: Present Perfect
3052 Views
09:03
The Use of the Present Perfect
1293 Views
03:08
Meaning and Form
1335 Views
02:40
Writing Formal Letters
1329 Views
03:10
Language Use
1925 Views
09:35
Parallel Structure
1478 Views
04:35
Prepositions of Instruments and Means
1313 Views
03:27
Polite Requests
1382 Views
06:30
May as a Modal of Permission and Request
1361 Views
04:11
Can as a Modal of Permission and Request
1155 Views
02:50
عناصر الاداء
1317 Views
03:45
شركة ستيرن
889 Views
01:15
مقياس القيمة المضافة
1113 Views
02:58
مقياس الربحية
1080 Views
02:39
معايير دركر
1229 Views
03:51
مقايس الاداء
1254 Views
01:41
اتخاذ اجراءات تصحيحية
926 Views
01:52
المرحلة الثانية من الرقابة
944 Views
02:49
مراحل الرقابة
2241 Views